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APPLICATION r1151) AUG. 19, 1919.

Patented Sept. 20, 1921.

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APPLICATION FILED AUG-19, 1919. I I 1,391,531, PatentedSept. 20,1921.

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. UNITED, STATES PATENT QF I warm DOBTON, or manwoon, M ssouri.

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Specification of Letters Patent. I

Patented sept. 20, 1921.

Application filed August 19, 1919. Serial No. 318,458.

and middlings may be effected under conditions minimizing the cost as to the mechanism and labor, and to this end the invention consists of a construction, combination and relation of parts hereinafter specifically set forth, it being understood that changes in form and proportion may be resorted to, within the scope of the claims without departing from the principles involved.

In-the drawing-z Figure 1 is a view of the complete machine. I

Fig. 2 is a longitudinal sectional view of the same taken centrally through one of the series of the compartments.

Fig, 3 is a transverse section on the plane indicated by the line 3-3 of Fig. 2.

Within a suitable casing, preferably rectangular in plan there is arranged a plurality of longitudinal series of compartments, of which two are shown in the drawing, separated by a longitudinal partition 10, said compartments being numbered 11, 12, 13 and 14 and separated from each other and from a tailing apron 15 by the transverse walls or partitions 16, 17, 18 and 19 which have their upper edges located below the upper edges of the side walls 20 and the longitudinal partition wall 10 at graduated distances. In other words, the transverse separating partitions between consecutivel compartments of each series constitute baflles or obstacles over which the material in one compartment flows into the next compartment and are of graduated heights, decreasing toward the outlet or tail end of the series. As a simple and economical construction of the framework constituting the casing with its partitions and compartments into which the interior of the casing is divided, the drawing shows the extremities of the partitions mortised into the walls of the casing and engaged by vertical bolts 21, a similar construction being contemplated in transverse walls.

the joints between the transverse walls and the intermediate longitudinal wall, and transverse bolts 22 connecting the side walls of the casing adjacent to-the, planes of said The material is fed to. the initial or concentrate compartments '11 of the series by means of launders or chutes 23 and located within said compartments 0r bins are the concentrate cups 24x'and outletsr2'5 for the powdered concentrates, the other compartments 12 to. 14 inclusive of each series having similar concentrate cups and outlets.

Screens 26Jare arranged respectively in the initial and succeeding compartments or compartments are "arranged hutches 27 and 28 located respectively to receive concentrates and middlings passing through the At one end of :the casing containing the series of concentrate and 'middlings com- 'partments, upon a suitable extension 29, is

mounted a drive shaft 30 having a belt pulley. 31 and carrying. eccentrics 32 of which. the straps or yokes are-operativelyof the pistons therein serves to cause a sufiicient agitation of the contents to accelerate the separation and induce the prompt precipitation of the concentrates and middlings. The piston rod common to-the two plungersof each series is preferably divided bins of each series and at'the bottoms of. the I.

at an intermediate point and fitted with a coupling 39 to facilitate the removal for cleansing purposes, and intermediate bearings 40 may be located on transverse braces 41 spanning the compartments to prevent sagging of the intermediate portions of the piston rod. Moreover, packing boxes 42 and 43 may be arranged respectively in the end wall of the casing and the transverse wall between the compartments 12 and 13 for the passage of said piston rods.

In practice it is preferable to construct each piston or plunger of a block 44 of wood or equivalent material faced with iron or other suitable metal plates 45 secured in place by cross bolts 46,

removed until finally when thewater passes Preferably the compartments are pro-,

,mitted through the inlet 48, the flow being permitted until it rises to the height of the barriers, when the operation of the pistons affects an agitation of the water, causing it to flow over the upper edges of the'barriers.

The greater intensity of the flow is, however,

adjacent the longitudinal partition 10 and there is a tendency, to deflect the concentrates .towardvthe side walls so that they 'may be deposited in the-cups 24, the concentrate and middlings passlng through the screens beingdeflected toward the hutches 27 by the inclined hopper like floors 4E7. In each'succeeding compartment some of the concentrates and middlings left from the operation in the preceding compartment'are over the tailing apron practically all of the concentrates and middlings are removed.

The invention having been described, what vis claimed asnew and useful is: 1. An apparatus for the purposedescribed having a series of consecutively available concentrate and middlings compartments provided with separating screens disposed adjacent the tops of sald compartments and separated by transverse barriersof graduated heights, concentrate cups disposed at the upper edges of the barriers and above the planes of the screens, a feed launder and a tailing apron operatively disposed with reference to the concentrate and terminal middlings compartments, a bottom outlet hutch in ach compartment, and agitating means arranged between pairs of adjacent compartments in a plane substantiallyintermediate between the planes of the concentrate cups and the outlet hutches.

V V 2. Anapparatus for the purpose described having'a series of concentrate and middlings compartments provided with separating screens disposed adjacent the tops of said compartments and separated by transverse barriers of graduated heights, the screens being located successively'in relatively lower 7 planes in said compartments, concentrate and middlings discharge cups located in said compartments above the planes of the screens and adjacent the upper edges of the V barriers, concentrate and middlings hutches located respectively in said compartments adjacent the bottoms thereof, the compartments having hopper shaped floors leading to the hutches, and agitating means for agitating the contents of each compartment and disposedin a plane substantially intermediate between the planes of the said dischargecups and the said hutches. 7

he 'aflixes his signa- A In testimony whereof ture;

' WILLIAM DORTON. 

